William gilman



`l i of which the following is 'a speeitcation a y nona sont' WILLIAM .GILMML or OTTAWA, -ILLI'NoIsQ Letters Patent No; 105,668, dated July 26,1870.

' `nvxzexaovsnvrrav'1", INKMACHINES For:` ROLLING renew-Berlins:y

The Schedule referred to in these Letters Patent and making part ol the same.

I, WILLIAM GILMAN, ol"` Ottawa, in the county of l La. Salle, lin the State 'of Illinois, have invented a eertainImprovement in Plow-beam-rollingvMacliiuei-y,

The nature'of myinvention consists in cutting "or turning into the two rollers of a rolling-mill, a. groove,

for Ihepurpose. ofmannfacturing plow-beams of rolled iron. i Y' l The object of my. invention is to roll out said plowbeams` tapered at `bothfelnds, instead of a uniform thickness, as hasbeen done heretofore, the tapering i `being performed at the sameoperatiou and with the same heat, while the practice is, and has been, to reheat the beam at eachend after `it is cnt to the proper length, and to taper it oli' with a `.trip-hammer, then to reheat it again and `bend it to its proper shape.

`My improvement performing the tapering of` both ends during the rollingprooess,and'in as little time' as' if `the beam was rolled straight, therefore, leaves the iron hot enough after passing through the rolls to bend it to its proper shape, thereby saving three heatings and'much ot' the. labor of handling.

Figure 1, in the drawing-is aside elevation ofthe part of the maebine embodying my invention.

Figure 2 is a bar of irouas produced by my invention. l

Figure 3 is a View of "a'finished plow-beam.

The rolling-mill is constructed inA the ordinary man t into a round bar, then, dat, and finally, the bar is made to pass in the groove C, which gives it the Hanges, if`a flanged beam is desired, and also tapers both ends of each beam; theheams being still attached to each other, will have to be cnt at the places marked D D I), fig. 2. After this, and while still hot, they are brought into a press, constructed especially for that purpose, and bent into "the shape required for a plowbeam, whether it be a. ground-plow or eultivator-'plow, (see iig 3.)

I am aware that rollers with grooves, so shaped as to be capable of reducing hars to a vtapered form from the middle or thereabont to the extremities, are not new, and l diselaimanyright or title to such adeviee singly; but

What I do claim as my improvement in rolling ap-A paratus, s Y A The grooves O, with lateral walls curved, asv de-,l

scribed, and with llat bottoms having marginal groovesl 

